import random
from urllib.request import urlopen
import sys

WORD_URL = 'http://learncodethehardway.org/words.txt'
WORDS = []

PHRASES = {
    "class %%%(%%%):":
    "Make a class named %%% that is-a %%%.",
    "class %%%(object):\n\tdef __init__(self,***)":
    "class %%% has-a __init__ that take self and *** params",
    "class %%%(object):\n\tdef ***(self,@@@)":
    "class %%% has-a function *** that take self and @@@ params",
    "*** = %%%()":
    "Set *** to an instance of class %%%.",
    "***.***(%%%)":
    "From *** get the *** function,call it with params self,%%%",
    "***.*** = '***'":
    "From *** get the *** attribute and set it to '***'."
}
if len(sys.argv) == 2 and sys.argv[1] == 'english':
    PHRASE_FIRST = True
else:
    PHRASE_FIRST = False

for word in urlopen(WORD_URL):
    #(str(word.strip(), encoding='utf-8'))
    WORDS.append(str(word.strip(),encoding='utf-8'))

def convert(snippet,phrase):
    class_names = [w.capitalize() for w in 
                    random.sample(WORDS,snippet.count("%%%"))]

    other_names = random.sample(WORDS,snippet.count("***"))

    results = []
    param_names = []

    for i in range(0, snippet.count("@@@")):
        param_count = random.randint(1,3)
        param_names.append(','.join(
            random.sample(WORDS,param_count)))

    for sentence in snippet,phrase:
        result = sentence[:]

        for word in class_names:
            result = result.replace("%%%",word,1)

        for word in other_names:
            result = result.replace("***",word,1)
        for word in param_names:
            result = result.replace("@@@",word,1)

        results.append(result)

    return results

try:
    while True:
        snippets = list(PHRASES.keys())
        random.shuffle(snippets)
        for snippet in snippets:
            phrase = PHRASES[snippet]
            question,answer = convert(snippet,phrase)
            if PHRASE_FIRST:
                question, answer = answer, question
            print(question)
            input('> ')
            print(f"ANSWER: {answer}\n\n")

except EOFError:
    print("\nbye")
